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This study aimed to develop and test a structural model for sleep quality in female shift work nurses. The hypothetical model was constructed on the basis of Spielman's 3P model of insomnia and previous research related to the sleep quality of shift nurses.
This cross-sectional study used structural equation modeling and recruited 285 female shift work nurses from four general and university hospitals with over 300 beds located in C and J cities in Gyeongsangnamdo. Data were collected from September 27 to October 20, 2016, and then analyzed using descriptive statistics, Pearson's correlation, and structural equation modeling. The study used SPSS/Win 18.0 and AMOS 18.0 in processing the data.
The final model showed good fit to the empirical data: χ2/df=2.19, SRMR=.07, RMSEA=.07, AGFI=.85, TLI=.91, GFI=.93, GFI=.89, NFI=.87. The factors that influenced sleep quality were sleep hygiene (β=.32), perceived shift work status (β=−.16), stress response (β=.16), shift work experience (β=.15), perceived health status (β=−.14), and circadian rhythm (β=−.13) explaining 36.0% of the variance.
The model of sleep quality of the shift work nurses constructed in this study is recommended as a model to understand and predict the sleep quality of shift work nurses. The results suggest that strategies for improving the sleep quality of shift work nurses should focus on sleep hygiene, perceived health status, stress response, circadian rhythm, perceived shift work status, and shift work experience.
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In order to investigate of the effects of rapid rotating shift work on physiological stress, the activities of urinary Na+, K+, Cl- were measured in 14 rotational shift nurses, during day shifts(8AM-4PM, n=4), evening shifts(4PM-12MN, n=5), and night shifts(12MN-8AM, n=5) in hospital twenty students attending nursing college a used as control group. Urine specimens were collected in 30 minutes before and after work on the second day of shift work. In day shift nurses, Na+ activity was 137mM at 8AM and increased to 206mM at 4PM, whereas K+ activity was 42mM at 8AM and no significant change at 4PM. Cl- activity was changed from 234mM to 344mM at 4PM at 8AM. In the evening shift, Na+ activity was 117mM at 4PM and 140mM at 12MN, K+ activity was 22mM and 32mM, respectively. Cl- activity was 169mM and changed to 270mM. During the night shift, Na+ activity was 128mM at 12MN and changed to 161mM at 8AM, K+ activity was 42mM at 12MN and 8AM, and Cl- activity was from 303mM and changed to 355mM. In general, the urinary ion activities seemed to increase after work, however there were no significant changes in ion activities except the Na+ increase in day shift. The mean of the activities of K+ and Cl- before and after work during the day and night shift were significantly higher than those in control group(P<0.05). K+ activities were also higher than that of evening shift(P<0.05). However, there was no difference in Na+ activity among the control group and three shifts. There was a significant relationship among urinary Na+, Cl- and K+ in the control group and rotating shift nurses except between Na+ and K+ in shift. The relationship between Na+ and Cl- was low in shift work and there was no significant relationship between Na+ and K+ in shift, suggesting that the active regulation K+ and/or Na+ in response to stress upon the shift work disrupted the ratio of urinary Na+ to K+ and also lowered the relationship between K+ and Cl-. These results suggest that nurses working the day shift were overloaded and under stress, and the night shift interfered with the physiological rhythm of the nurses.
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This study was an experimental study to compare the inhalation effects of aroma essential oil on the quality of sleep (QOS) for shift nurses after working nights.
The participants were 60 healthy adults who didn't have any disease. As an experimental treatment, the participants in the experimental group were asked to inhale essential oil for 3 minutes at a distance of approximately 10 cm fromt heir nose and then they were asked to sleep with the aroma stone beside their head (within a 30 cm distance). QOS were measured four times on Pretest, Day 1, Day 2, and Day 3 after they slept. To measure QOS, Perceived QOS (Numeric Rating Scale), the Verran & Synder-Halpern (VSH) Sleep Scale were used, and number of awakenings (NoA) was measured by Actigraph.
There were no significant differences in the homogeneity tests for general characteristics and dependent variables prior to the experiments, except for VSH of subjective sleep quality. Also, there was no significant interaction between group and time. The VSH of the experimental group was higher than the control group (F=6.39,
The findings show that the inhalation of aroma essential oil had effects to increase the quality of sleep. Therefore, the inhalation of aroma essential oil could be applied to general nursing interventions to improve the quality of sleep.
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